how can i prove i live in a different apartment when i have no lease or nimo bill.but have bill collectors trying to get me to pay other peoples bills

You can "prove" it with a DMV issued ID card, or copies of paid utility invoices.  Bills are normally charged to a name and address and often linked to a social  security number.  If the debt has a different name, address or SS#, don't pay if it's not yours!